Merc. 502 Oil Cooler, Rear Mount

I'm told I need one of these. It's the rear mount one, above the bell housing (not the low side mount). Anyone have a P/N or source. Thanks.

I just looked on merc card and found many listed
816082t old design with end caps out let points up 92 93
817577t new design appears same in pic
805561t1 shows p/s ports 93 95
806423t straight thru type with p/s ports shown 93 95 efi
849952t in and out lets point down with end caps 500 efi

need more info, there are 3 support bracket choices

Thanks Jim,
No P/S on this motor, oil only. This is for a Gen VI 502.

The gen IV '90 '92 oc878221-od824588
used the 816082t and the 817577t

The gen V '92 '93 also used the 817577t they both appear the same in the pic both have straps that attach to a bracket connected to bell housing , but bracket has a different #

Thanks Jim!