I think I read where H and H had them ,,,I could be wrong. A good starting place to check though. Also,,,San Francisco Flatheads is supposed to have them as well . Tommy
You might want to contact this guy as this thread wasn't that long ago. https://www.jalopyjournal.com/forum/threads/255ci-french-flatheads-for-sale.1049922/
https://www.ebay.com/itm/BRAND-NEW-STAGE-II-FRENCH-SF-FLATHEADS-FORD-MERCURY-59A-BLOCK-HOT-RAT-ROD-1932/361748070828?_trkparms=aid=111001&algo=REC.SEED&ao=1&asc=20160908105057&meid=c6381ecaed564252b41618edf7302170&pid=100675&rk=1&rkt=15&sd=223807894339&itm=361748070828&pmt=0&noa=1&pg=2380057&_trksid=p2380057.c100675.m4236&_trkparms=pageci:5ffe363a-2c07-11ea-874d-74dbd180f2bf|parentrq:5d86421016f0a9cce02ed2beff970c6c|iid:1
That's a deal . I guess I can count myself extremely lucky to have picked up a C59A/C69A engine for CAN$100.00 that was good to go.
Know that they have much smaller intake runners,alump of casting at the rear where the tacho drive or governor runs of but are thicker on the deck and much better metal ,more akin to steel than iron . prolly higher nickel content. try and score the french 4" crank rather than a scatt .