I looked up one other replacement board brand and could see it also used the same parts (LM317 and LM337). I've been a senior electronics tech for 25 years. They are pushing these components past their design limits. So like mentioned it doesn't take much to make them fail. I'm sure they will mention they are fuse protected but even then the parts get stressed before the fuse blows even if it's a fast acting one. Why do they use them ? Because the older parts are obsolete and hard to find. Also designing a more robust board can price them out of the cheapo competition.
Check on a getting info etc on the pinscore replacement. They are normally designed with options that require you to do no rewiring etc.
You could also fix your current board. Check these suppliers for those old obsolete parts needed:
www.greatplainselectronics.com (mentioned first out of courtesy)
www.jameco.com
www.newark.com
www.mouser.com
If you don't see what you need give them a call. They often can find it. I've gotten many so called obsolete no longer available parts from these places. We have also used them at work as much of the equipment we repair is old and the owners don't have the budget to buy new.