replacement tires kubota b7800, b2710, b2910

[Gene H]

Need to replace front 7-12 tires on my Kubota. For me given my location, 7-12s can be had however, shipping is way expensive along with tire price.

Is there an alternative that will fit the 7-12 rims? Is it a problem if I choose to go with 23x8.50x12 tires on my old 7-12 rims?

Looking to some 'expert' opinions.

Thanks in advance.