Authentic rising rate fuel pressure regulator ordered directly from Bell Engineering ( BEGi ) Purchased new to turbo a 1st gen Miata that has since been sold. The regulator has never been installed or fuel ran through - it is like new. Original bracket and hoses.

eBay listing below - that should take care of payment and shipping ( you can search for BEGi Turbo FPR on ebay too if you dont want to click a link)

Begi Turbo FPR Rising Rate Fuel Pressure Regulator Bell Engineering Adjustable | eBay