Well here is a list of grips for the HP22 /HP25 that I have been able to track down .
If all your after is a different color you should take a look on ebay.
There are several people that have made molds of the stock grip panels
and are selling copies in various colors.
Maybe you want something with abit more
style there are several people selling the grips
that have been hydrographically printed on ebay. .
If you want some very nice Wood grips for your HP22 or Hp25 you need to check out
http://www.my2ndright.com/