Series 3 Repair panels - can't find these ones?

Got some tunnel rust. Does anyone make replacement panels?

Ahem. That looks like pretty marginal rust? Is it really that bad? How bad is it under the mat and the footwell of the bulkhead? I suspect you've bigger problems. You also seem to have a bolt hole without any bolt in the footwell. You must be getting water entry. On the photo it looks treatable but suggest you investigate more. Also go to YRM Solutions website and see if they do the interconnection between the gearbox cover and the bulkhead if it's all rotten. What are the rubbber grommets plugging? That's where the static throttle is usually mounted.

No idea what the rubber grommets are plugging, i'm new to landys. I am hoping to repair but was looking for options if it has gone too far. Floors are actually fine. This is the only rust I have so I am really lucky.

http://www.retroanaconda.com/landrover/parts_books/series3/9_body.pdf might help.
Then again, every model seems different, so nobody makes them any more!

Britpart may also be worth checking but tbh their quality is ****e. I'd focus on the bulkhead side of that first. You want to stop rusting of the bulkhead above all else. The gearbox cover is less critical but I'm sure YRM does replacements and all the bolts and fixings.

Pegassus show lots of nice pictures for these parts - not sure if you can still buy them though...