I've have an older MVVS 6.5cc engine that i'm looking to rebuild. Im in need of some parts such as, piston & sleeve set, bearings, gaskets, and a throttle arm for the carb. Where can i get these parts, and what would be the "rough" cost to have it all rebuilt for me.

If you need a complete rebuild, a new engine would be better, and as cost/time effective as exchanging all the parts. Mail cost for a part is as high as sending a complete engine. If you were rebuilding a GRRT, the story would be different of course.
I do have a lot of spares, and I am certain Dar will have them as well.

the engine probly doesn't need a completely rebuild.. i truly only need the throttle arm, and "maybe" bearings. its been sitting in a box for 3 years but still turns over very freely... i was just wondering how much the parts for an complete rebuild would be.. and i can do the rebuild myself, just dont know if i'll have the time anytime soon to do the rebuild.

The lever is less than one Euro, Bearings are standard metric for about 10 Euro,s and a cylinder set will be about 25 Euros