Where can I find replacement Velodyne HGS Sub amp


I have had 2 HGS Subs. The HGS 10 and 15. Both amps went in less that 3 years with minimal use and low volumes. Has anyone found a good replacement amp or had luck with repairs? Is there better series of amps?
harleyhawk
Velodyne was great to deal with. I drove my HGS 12 down to them and they fixed it for me while I went to lunch. It cost about $170 to replace the internals....
I had an HGS 10 for about 6 years, amp went out three times. didn't fix it the last time.
Do you remember the phrase,"planned obsolesence?"(Sp?) Velodyne must've learned from the general motors school of engineering - My amp went out after 4 years-The only amp Ive had a problem with in my 30 years in this hobby.