Hollister as Misty suggest is my favourite and I use the majority of there products supplied through Fittleworth as this was what was setup for me in hospital. I sent them a list of what I fancied trying from their website and they sent vitually everything (except for some item that were in hindsight not suitable)
But I have been doing the rounds too and you can also add the following manufacturers or suppliers to your sample list on top of Misty's suggestions:
Bullen
OakMed
Pelican
3m (Cavilon barrier spray/ wipes)
Trio Diamonds (solidifying sachets)