As said in the other thread, the stock tires would be very difficult to find. A period correct alternative could be the Kenda K50 BMX Cruiser tires, they should be available as replicas in 26" and 24".
I’d get some searches dialled in and saved on eBay then prepare for (probably) a long wait. Stuff does sometimes eventually turn up with a little patience.
This bike shares the same original tyres and wheel size as a Muddy Fox Bigfoot. There was one a while back on eBay I think with the original tyres so could be worth expanding searches. I’m sure there are many of us on here who have bought a whole bike just for the tyres.
Keep an eye on bikes for sale here sometimes a seller is willing to sell tyres and may have spares for that bike.
This sort of rarity it’s going to be luck and persistence.
Thank you for your reply & offer.
I have found a NOS Panaracer from the 80s for this bike. For this reason a used Kenda tire is not matching to the 26“ front tire.
Thank you.
Cheers