Yes Valeo 81666 is the OE item but it's very hard to separate the oil cooler pipes from the cooler without breaking anything. Normally the pipes rust away at the bottom first, what are yours like? Aftermarket coolers can be fitted, typically they are longer but fit OK if you cut off the outermost fixing stud. Pipes are no longer available but you can cut them in the vertical parts as they go past the alternator and fixed some braided hose for the rest of the connection to the cooler. Various specialists may be able to supply a ready made oil cooler pipe solution, try FCSS or MCS.
2000 Pearl White Plus & 1996 Portofino 20vt
1985 & 2016 2017 Fiat 124 Spider + XF Sportbrake