Sea Kayak Gear

Some friends are coming to Bangkok next week and then on to Indonesia where they've booked a sea kayak excursion. Problem is their airlines lost their luggage somewhere between California and Taipei (where they are now). That luggage includes some of their kayaking gear and so their asking me if there is a shop in Bangkok where they can replace their stuff. I'm sure there is, but I wouldn't know where, so any advice is much appreciated. They specifically mentioned paddling gloves and "dry bags". He mentioned that any shop that suplies river or 'whitewater' kayaking would likely have this stuff.

I think here's an outdoor gear shop in Amarin Plaza and I thought I saw one in Central World. I'll check those this afternoon but if you have any other ideas please send them along. Cheers.