I had to replace my mechman alternator on my SBC and couldn't find anything that fit my front runner setup. Had to call mechman directly and worked with a rep to order build to order setup... not cheap and took 3 weeks to get it shipped.
Appears Jegs lists the part in your case with an estimated 4/2 ship date direct from Mechman most likely... no clue on international shipping:
https://www.jegs.com/i/Vintage-Air/960/040707/10002/-1