Anyone know where I can buy tubes for 37x12.50x17 tires?

Here is the thing. I usually carry several cans of that foam to be used in case of puncture. The trouble with this solution is that the cans need constant replacing especially when four-wheeling in hot environments. Also, the foam is only good for small puncture holes and, even then, only when they occur on the thread of the tire and not so much if the hole is on the side-wall.

I also have another repair kit but don't know what it is called. It looks like strings that you jam through the puncture hole. However, even this kit doesn't solve the problem of a cut in the side wall.

Since I run beadlocks, I thought that in case I should slash the sidewall on two tires (one tire and the spare) I thought the next best thing would be to reinforce the gash from the inside of the tire and then stick a tube in.


Anyone have any other solutions they can suggest to repair slashed side walls?

Anyone ever bought similiar sized tubes? I have done a search on the web but couldn't find anything of that size.

TIA
g