Here is a used round OBERG Ufo 6" dia with washable stainless steel filter takes the -12 an fittings.
Oberg 6" Ufo Tattle Tale Filter IMCA UMP Dry Sump Parker Racor Race Car
4 Gallon Aluminum Dry Sump Oil Tank & Oberg 6" Remote Oil Filter WDR5
OBERG 6" TattleTale In-Line Filter IMCA UMP DRYSUMP PARKER RACOR
PARKER / RACOR 6" TATTLE TALE OIL FILTER-RACING-DIRT-LUCAS OIL-WoO-DRAG-ASPHALT
