Why do you need to buy something in order to remember him by? Surely the memories alone will keep him alive in your thoughts and not some material item.
Hip flask?
When my Granddad died in 1980 I was left his wedding ring and his navy medals and I was over the moon while everyone else was fighting and arguing, its sad really how a funeral can destroy a family when its the one time they should all be there for each other.
Unfortunately 8 years later when I joined the RAF I left his medals with my parents for safe keeping and my mum pawned the lot claiming they should have been hers anyway as it was her father that died.........
I still have his ring though.
/snip.
however i wouldn't mind some other ideas, or to hear from others who have bought gifts in these circumstances. If this is actually a done thing?!
Cheers all.