any waterbowl will do. they just need to drink from it.
beyond that it depends on your setup. Is your BP in a tank with a natural looking set-up or a basic tub with just substrate and/or hide? So do u want a natural rock looking waterbowl or a ceramic/plastic bowl?
you don't really need a big waterbowl unless your BP has mites and wants to soak in it.
and here's a link: http://www.amazon.com/s/ref=nb_sb_no...ake+water+bowl
Edit: BTW how is your BP with the big open wound doing? have u called or gone to a vet yet? i've been online for an hour and noticed you've been on too.