(G) Sun Roof seal

I have an 89 Uno Eleganza and want to replace the sun roof seal. It is the tilt and slide type. I had a problem with a leak a few years ago and sorted it with some window sealer. I also need to remove the sun roof to get at some nasty rust spots and I may as well replace the seal as it looks badly perished. Could anyone tell me of a good, value for money mail order place (if one exists) that can help me. I don't want to go through the main dealer here as they are disastrous. I tried to order something a while back and they couldn't make sense of my chassis number even though I brought the car down to them twice.

Anyone out There know of a site that sells bits for UNO's?