What do you mean by filter issues with fine mesh? No resin should be used as a filter. Fine mesh causes a larger pressure loss than regular mesh, maybe that's what you mean.
Some dealers sell fine mesh because it is supposed to give you a bit more salt efficiency so your softener will be programmed for fine mesh but if you know how to change the dealer side of the programming, you can set it up for regular mesh but, the bottom basket should be changed for regular mesh. You'd change the whole distributor tube because the bottom basket is usually 'glued' to the distributor tube.
Any of us online dealers sell both kinds.