I purchased this one here from a UK seller on ebay and it works perfectly with my VP50. The same seller sells the same PS for the VP50 Pro as well. Took about 2 weeks to reach me on the US west coast. It cost about $24.
Or you can spend about $80 from Amazon US. The Amazon listing is the one DVDO tech support directed me to but they also said the one I found on ebay should work just as well, and it does.
Keenan, unfortunately Amazon US won't ship this product to Canada. And amazon Canada doesn't even carry it. I think I'll pursue this UK seller you eluded to. Is there anything to be aware of since the UK seller is 6V 5A vs. 7A?