Well, before giving up on the mitt and trading it in for a new model, try fixing it instead. For about $5, you can get a lacing needle and some rawhide lace and maybe salvage that mitt for another season or two.
Lace. You will need this if you need to replace the lacing.
Step 1: Survey The Damage
For this particular repair, the lacing had been pulled out of all four fingers and had been retied along the top to hold the fingers together. But the lacing itself was intact so I reused the old lacing and saved the new lacing for another repair.