Don't have any experience with SMD soldering but there's a first for everything right? 
It is actually pretty easy once you get the hang of it. And the SMDs Mikhail chose are not the gazillion-of-tightly-spaced-micro-legs type anyway, so everybody should be able to do it.
What did you use for a power supply? I'm having a hard time finding something that can supply +80V,-80V,-12V,+340V on the cheap.
You have several optios:
- Have a transformer custom made
- Look for a transformer with 2x~60V sec and get an extra one with 12V sec. Add a third small 230V(2x115V)/9-10V in reverse, secondary connected to 12V. The preamp draws only a few mA, so that would be an acceptable solution.
Or use the step-up powersupply Mikhail suggested and adapt it for the higher voltage. But be warned, the devil is in the PCB layout, you may encounter all kinds of noise and oscillation if you have no prior experience with that kind of stuff.
Also what are your output transformers specs? I got some trannies from a broken SS poweramp that i'm going to have rewound by a buddy of mine.
I only built the MicroPA and used the suggested Xicon trannie, which is available from Mouser, for about 5 bucks IIRC.
If you are going to rewind an existing trannie, make sure to get the measurements done to guestimate the core's specs before you take it apart!
If you need help with that, KMG made some excellent posts and also has software to make the calculations more convenient on his webpage.