See if HP offers such or if you can find working ones on Ebay.
PS. I have a few Windows Mobile devices as our office wrote apps for those. So far only a few have died.
I have some hp palmtops, two hp660lx and one hp620lx, that will not turn on anymore.
They all used to work perfectly. But now none of them will turn on at all. On one of them the power light will light up when plugged in to the AC power but the others won't even do that much.
I love these little things and would hate for them to become useless. I tried doing a soft and hard reset, and I also put new 2032 batteries in them. But they still don't work.