Okay so the bulbs are not hard to find. The ones that kept popping up for me were bulb and lenses. So after I swap the bulb in the a.m. I may bite the bullet and buy a set of the sylvania Ultra's. I have been using these in my 03 Suburban for almost 5 years and love them. Yes the durability comes into play , I think they have been lasting about 2-3 years before one or the other goes out.

__________________
92 500E Silver 66k
82 Porsche 911SC 84K
68 Cadillac ( Gone Now )
03 Suburban Z71 200K
85 300SD 217k From Original Owner ( Dad )