I noticed the place I usually buy parts from online not only has the transmission filter, pan gasket, drain seal but also the dipstick tool, locking pin and MB fluid at $8 per liter so I will probably just order the materials and do it all myself when the weather improves some.

I usually order from these guys:

http://www.maximumautoparts.com/

Free shipping on orders over $50 and I get them the next day in NH.