Yes, but you will not find an off-the-shelf unit with an in-tank cooler.
Your best bet would be to rip it out and get a custom unit made up using the original as a template and have the OE in-tank cooler ripped out and installed in the custom unit if you do.
While it is being made up, may I also suggest getting Nismo thermostat from RHDJapan (Good price & fast delivery).
Mine died after the week of 40degree days we had in Melbourne last year. Burst the top tank, bottom tank and also split some of the core.... I guess if you are gonna go, might as well make it spectacular!
M35's struggle to stay cool at the best of times, so a larger, more efficient cooling radiator can only help.
I strongly disagree!
The standard radiator is well suited to the cooler Japanese climate, but it has a limited life over time in Australian Summers IMO
1700kg, AWD turbo wagon in 30-40degrees day in, day out for a solid 2 months? Yeah, I'm sure a small 15mm core radiator will do the trick in there.
Unfortunately I would not be surprised to hear of a couple of M35's overheating this summer... as mine and Jetwreck's did early last year.
Particularly those that have over 100,000kms on the clock.