leather protection

I have a 4 door 2011 335i with the M-Package, which includes the narrower leather seats with oversized side bumpers. I've noticed that the leather on the outside bumper is wearing very badly. Is there a simple cover or option to avoid further leather wear?

When I purchased my 528 a few weeks ago, the finance manage convinced me to add a leather protector to my interior (have kids). I have the oyster white and she had mentioned she could do this for $299. Before going in, I told myself to refuse all the dealer add ons, but some how I got weak...