Hey all, there is a PEI/Ultem steam tuners type of cap now available on FT for any interested:
$4.14 Kayfun Bell Cap w/ 510 Drip Tip - PEI material at FastTech - Worldwide Free Shipping
$4.14 Kayfun Bell Cap w/ 510 Drip Tip - PEI material at FastTech - Worldwide Free Shipping