Prescription Mask With Drop-in Lens and Purge

[polypheus]

I am looking for a mask for snorkeling and snuba (not scuba) diving with a drop-in lens and purge valve for around $100 or less total price. So far the best one I've found that is closest to this criteria is the Tusa Splendid IV (M-40) mask. However it doesn't have a purge valve.

I can't find very many masks with drop-in lenses other than the Tusa M-40 and none with a purge valve. Does anyone here know of one?

Thank you!