Beach cat tires 21x12-8 slick

I have the classic Florida Sailcraft beach wheels, they are great. I have been keeping them going for many years, with routine checks, maintenance, and then inner tubes when they cannot hold air.
HOWEVER, sometimes the tire body itself is no good, and in the past I purchased "Nanco N800 Slick" from Walmart. However, Walmart is out of stock

https://www.walmart.com/ip/Nanco-N800-Slick-21X12-00-8-A-2PR-Tire/55346860?classType=REGULAR&from=/search

does anybody know where these tires can be purchased? Florida Sailcraft only sells Wheel+tire assemblies. which are >my allowance.

the closest I have found is this :
https://autoplicity.com/13611228-nanco-27245001
but I think it is actually 18x8.5x8

every other search result for 21x12-8 comes back as out of stock.

HELP

Jim Casto
NACRA 5.5 uni (+jib) TWO HOT = for sale
Prindle 16 "Winned Instrument"

ex N5.2, N5.8, N5.0



Edited by jcasto1 on Jun 27, 2025 - 03:45 PM.
You can go to Where to Buy Nanco N800 21×12‑8 Slick Tires:
eBay (US) to buy replacement tires. The price for a new tire is $62 (free shipping via seller SimpleTire). I think this is a pretty reasonable price. Slither io