Ahh... the Mega CD... probably the worst console I've ever come across in terms of fragility.
Just to foreworn you, as you've not powered it up yet, and depending on when the unit was last in proper use - the rubber belt that drives the CD tray will most likely need replacing, the CD lasers pack up because they're conventional lasers for music CD playback, the limiter switches pack up (you'll hear a loud and annoying clicking noise when trying to load CDs), the ribbons that connect all the internals together - be very careful with those if you're going any further with stripping the unit yourself.
I don't have someone I can recommend for the cap repairs... so far as to say, I know people, but don't know whether they do this kind of work.
Good luck though, they're funky bits of kit when they actually work