Dave O'R had rough stuff paddles too, he might have a recommendation to offer about them.
There was a pair of galasport paddles in the trailer paddle cage at the club trip on Saturday, I handled them quite briefly (just to make sure they got the bus home rather than the cage) but I think they had rounded edges.
You could check out the canoes and kayaks for sale facebook page, you might pick up a bargain there, I seem to recall a post from somebody who was "giving up polo" and selling of gear, it'd be worth keeping an eye on.
No first hand advice from me though, I'm on the same set of Werner Players two and a half years later and there's no way those spikey needle fibres are polo legal!