Just came across this site -- https://www.numberproxy.com/ It's a proxy service for phone numbers. I haven't used this site myself, but it looks like a simple way to create as many PVAs as you want. Description on site -- Instantly create a temporary disposable phone number to send and receive calls without revealing your real number. Whether you are posting an ad, online dating, or just need a local number, now you can give out your number without giving up your privacy. Enjoy.