EDCO does precisely the same thing - all Procon parts, factory authorized repair with testing. You've got three choices, they will rebuild your pump, or they will sell you a rebuild, or they will sell you a new pump. For the S1 La Spaz the prices are $45 to rebuild, $135 for a rebuilt pump (if you don't have a core), or $185 for a new one (at least that's what they were back in February). They will also let you trade up/lateral in some cases - if you send them a pump you can get a discount on a rebuild of a different type. I'm going to be doing that because I have a 100gph pump that I don't need, and could really use a backup 15 or 25gph pump.
I have rebuilt several rotary vane pump heads myself, and it really is not too difficult if you have a factory rebuild kit and a sonicator of some sort. One thing is for certain, a fluid rotary vane pump is more difficult to rebuild than a vacuum rotary vane pump...
BTW- I had originally put my 100gph pump in the La Spaz as an emergency replacement. You definitely want the right pump for the right job, though. I had so much water running out the expansion valve it was like I was pulling 5 shots at once. That murders your heat stability... I was able to get nice looking shots, but they were inevitably on the sour side.
