i've found alot of different one, and wasn't sure what would work. but alot of them would make the BOV upside down and i don't wan that.
Might have better luck getting an OE UICP and getting a flange welded onto it in place of the stock BOV flange. However, you're probably better off getting the aftermarket with the flange already on there for mounting purposes. Aftermarket BOVs tend to be larger than Mitsubishi's OE blow off valve, in which case, they need more clearance so they don't rub on the hood and damage it.
2.5" INTERCOOLER ADAPTER BLOW OFF VALVE FLANGE PIPE BOV, 2.5"Type H/RFL BOV XS weld on Flange Adapter IC Pipe , (FREE SHIP) RED TURBO BLOW OFF VALVE BOV+2.75" ADAPTER FLANGE PIPE, 2.5" INTERCOOLER PIPING TYPE RS S TURBO BOV BLOW OFF VALVE ALUMINUM FLANGE PIPE, Gold Type RS BILLET Turbo Blow off Valve BOV + 2.5" FLANGE PIPE TUBE ADAPTER NEW, CAST BLOW OFF VALVE BOV ADAPTOR FLANGE PIPE 2" TURBO, Red Type RS BILLET Turbo Blow off Valve BOV + 2.5" FLANGE PIPE TUBE ADAPTER NEW, SSQV SQV BOV Blow Off Mild Steel Weld On FLANGE Turbo Intercooler Charge Pipe , 92-95 HONDA CIVIC 94-97 ACCORD BOV WELDED FLANGE PIPE, UNIVERSAL BILLET ANODIZED TYPE-S TURBO BLOW OFF VALVE BOV+2.5" FLANGE PIPE BLUE, 2.5" INTERCOOLER ADAPTER BLOW OFF VALVE FLANGE PIPE BOV, 2.5" BLOW OFF VALVE ADAPTOR BOV PIPING SSQV FLANGE PIPE TYPE S RS, 2.5 TYPE RS S BOV TUBE BLOW OFF VALVE TUBE PIPE FLANGE, 2003 2004 2005 DODGE SRT4 SRT-4 HARD PIPE + TURBO INTERCOOLER W/ BOV FLANGE, TURBO RED SSQV BOV FLANGE SILICONE REINFORCED 2.5" ADAPTER PIPE W/ CLAMPS TOYOTA, TURBO RED SSQV BOV FLANGE SILICONE REINFORCED 2.5" ADAPTER PIPE W/ CLAMPS SUBARU, TURBO RED SSQV BOV FLANGE SILICONE REINFORCED 2.5" ADAPTER PIPE W/ CLAMPS NISSAN, TURBO RED SSQV BOV FLANGE SILICONE REINFORCED 2.5" ADAPTER PIPE W/ CLAMPS HONDA, TURBO RED SSQV BOV FLANGE SILICONE REINFORCED 2.5" ADAPTER PIPE W/ CLAMPS MAZDA, 2.25" BOV FLANGE ADAPTOR 240SX S13 INTERCOOLER PIPE JDM, 2.5 TYPE RS BOV TUBE BLOW OFF VALVE TUBE PIPE FLANGE , (FREE SHIP) RED TYPE S TURBO BLOW-OFF-VALVE BOV+2.25" ADAPTER FLANGE PIPE, TYPE-S-RS TURBO BLOW OFF VALVE BOV 2.5" ADAPTER FLANGE PIPE PIPPING UNIVERSAL, SSQV SQV BOV Blow Off Mild Steel Weld On FLANGE Turbo Intercooler Charge Pipe , 50mm Blow off Valve BOV Stainless Steel SUS 304 Weld On FLANGE Charge pipe, CIRCUIT SPORTS HOTPIPE W/ GREDDY BOV FLANGE 89-94 NISSAN 240SX S13 SR20DET SR20, CIRCUIT SPORTS HOTPIPE W/ HKS BOV FLANGE 89-94 NISSAN 240SX S13 SR20DET SR20, Purple Type RS BILLET Turbo Blow off Valve BOV + 2.5" FLANGE PIPE TUBE ADAPTER, Black TURBO SQV SSQV JDM BLOW OFF VALVE BOV + 2.5" Flange Pipe Tube Adapter Kit, 2.25" TYPE S RS FLANGE PIPE TURBO BLOW OFF VALVE BOV,