Are you planning on doing this yourself? If so, I would just get both kits and replace both so you're only doing the job once, dropping the headliner is no cake walk for a Saturday fix.
Looks like both kits use all the major components needed, I would also get a packet of lubricant as you will need it to grease up all moving parts
BMW E53 X5 N62 4.8L Interior Sunroof ES#2194672 Sunroof Lubricant - 83192157321
Might also want to do the seal too which you are at it
BMW E53 X5 N62 4.8L Interior Sunroof ES#260387 Sunroof Seal - 54107199533
Spend a weekend working on it and I guarantee afterwards you will be proud and feel closer to your X if you fix the sunroof yourself, with about $400 worth of parts.
Considering you got a smoking deal on a well equipped manual X, I think its a good investment to just fix the sunroof properly.
I don't condone the dremel fix and removing screws to me sounds like avoiding a problem.