I can't help with the meter or a repairman but Jon Goodman sent me a lightseal kit (including the foam on the bottom of the prism) for a great price with great instructions for my OM-1n. It worked great (until some sea spray salt jammed the shutter a couple weeks later but you can't plan for sea spray salt)!

If that interests you a quick search on this forum or a pm to me will get you his contact info.