I need to order some gator type blades for my walker. I know the 48 ghs takes one lh and one rh. My problem is the 42 is a mulching deck. Do I need two rh or two lh. I would say I need two lh, but by looking at the catalog it looks like I need two rh blades. I was going to order these from mow moore. Is there any better place to order blades? I used to order from stens but lost my catalog.