Yeah love the Mesa, it's my baby. Been perfectly reliable but I don't gig so it gets an easy life. I actually bought it with my first ever pay check, which makes it many years old! Build quality is really good so I wouldn't expect any problems. I just replace all the (original) tubes this year, need to get round to replacing the caps.
The fuzz face is a silicon transistor based one, no way to get hold of germanium transistors in this country, unless you salvage them from some old gear. Don't think I'll bother though - the bias drift due to temperature changes is horrific. I've actually since built a new circuit to go in there, used different transistors and added a trim pot to adjust the bias, sounds much better. If you're interested in building yourself the layout is available at: http://www.aronnelson.com/gallery/main.php/v/DRAGONFLY-LAYOUTS_0/album18/album144/SILICON_FF_VERO_001.gif.html
. It's a very easy build and all the parts are available from Yebo electronics (http://www/fort777.co.za
, they do cheap, quick online orders.