Assuming your vehicle is leaf spring front, just do an online search at your favorite Toyota aftermarket supply shops or other shops, especially ones that sell suspension parts.
My PWR radiator is also a nice unit, but it also came with all the mounting tabs and riv nuts to install the fan shroud. I only forgot to mention to install a drain🙄didn’t realize you had to specify you wanted a drain🤷♂️
You have a Hz right? They should have the specs for a HZ rad. I believe someone on here got one from PWR recently for their HZ. Maybe first contact PWR in Australia and then they’ll tell you to contact the US office. When I did mine they sent me some 2H rad drawings that I could then modify for...
That’s pretty normal for a H55, though I wouldn’t exactly call it sticking. I hardly ever use first gear. Would be interesting to try out a new H55 and see if it does the same