I have two different wheels that might work for you. 38x13x16 super swamper or 39.5x15x16.5 super swamper. both on 8 bolt rims. both have 70% tread. $100 for either one. might be able to deliver to lower mainland. call or text 604-848-5747Looking for 1 or 2 38x12.5 on a 16.5" 8x6.5 wheel for my 83 chev.
1 or 2, low tread is fine as it just for a spare.