s14 zenki frame rust,trying to find partnumber

hey can anyone look at the pictures and tell me what chassi part frame or member i need ?
i have tried looking at oem parts at
https://www.nengun.com and https://nissan-europe.epc-data.com but cant figure out exactly what parts i need to repair the bad rust ..can anyone find the right partnumber for me? its the part where you connect the stay assy[link] (55451M and 55452M) Ithink it is this part:74843?[link] any tips how to go about fixing this? the rest of the car have very little rust and its worth saving . Also do anyone have a picture of how a it should look like under there?
https://u.cubeupload.com/mikkime/t/1...0218573268.jpg
https://u.cubeupload.com/mikkime/t/1...0218573267.jpg
https://u.cubeupload.com/mikkime/t/1...0218573267.jpg

i found a couple of threads doing restoration of s14a(kouoki),do s14 zenki have pretty much the same under body?
https://www.sxoc.com/vbb/showthread....ration-S14-OOH
https://www.sxoc.com/vbb/showthread....ghlight=petrol
https://zilvia.net/f/showthread.php?t=618021

I'd suggest getting someone to fabricate new panels as I think getting them from Nissan will actually be more expensive.

If I get a chance later I'll have a look in FAST for you

okey,thanks.my though was if i got a nissan part it would look more original\oem and make it easier to weld..but after seeing a couple of restoration threads i think it can look just as oem fabricated..

The parts you would likely need are on this page, most are available but as Ben says they will cost you a fair amount of money.

https://www.amayama.com/en/catalogs/...993-1416/6/588
;:
You look like you'll also benefit from outer sills, available in the UK in high quality and low cost from here:

https://www.ebay.co.uk/itm/114439060395

s14 kouki/zenki and S15 are the same underneath, but you are better just fabricating replacement parts.
steve at SR autobodies sells replacement inner and outer sills which would speed up the repair process.

¨thanks guys..how can i get in contact with steve at SR autobodies? do he have a website or email?

The panels I have linked in my post are from Steve via his Dad.

He doesn’t sell S14 inners.

ahh.okey..the outer sills are fine really,but i think i need to change the outer sills anyway if i`m gonne change the inner sills..shame he does not sell inner:-)

You would honestly be better, in my opinion, going to an old school classic car company with a good fabrication team and having them rework the area and create new metal. Unless you fancy taking a gamble on the Nissan OEM parts, but even then, the area will need considerable work.

yeah..gonna do some research to find something like that nearby in my country..