Jord got his welded in by some guy off here, I can weld with no probs whatso ever. I just dont have the welder etc.
I need to do the same as you, the harness backplates need welding in and also the floor mounts for the seat.
I could ask at work for you if you wanted, but im a painter by trade not a welder lol so might be a bollock trying to fit you in.
Failing that, any garage will be able to get them welded up for you. Just mark everything up and tell them where to weld it
Oh and it may help, but i did a welding course at bolton college years ago if you went to a motor mech college near you and gave a donation to the funds they would sort you out as well, ive done this in the past when i fitted my rollcage in the nova Granted i did the welding mind lol.