Alpinestars sends their boot repairs to Sole Performance:
Here is the reply I got from Sole Performance:
Tech 8's sole repair
Sole Performance. (800)944-2755
We must purchase the soles in pairs,cost is 2 new "sidi" brand sole & new metal toe caps =$79.99 ship & handling(continental US)=$12.00 total= $91.99
Send to:
Sole Performance
165 so. el camino real suite k
Encinitas,CA. 92024
(800)944-2755 M-F 9:30- 6 sAT. 9:30- 5 pacific time.
I hear this is another good repair shop:
Freemont Boot Repair (616)924-0190
124 Stewart
Freemont, MI 48412
Myself, I've repaired just the replacable inserts with no problems that is if you haven't totally destroyed the whole sole area.