Hey Jon,
I ordered a Turbo Pad and a Blended Pad from Challenger and tried them today. The blended Pad was too thin for OP, maybe for a Step son or a nice spotting towel. The Turbo Pad appears to be like a Glad, good Glad. Very close to the weight and feel though the seems don't seem to be stitched as well. It cleaned well and stayed under the Defender without bunching and cleaned up well in the wash. The Turbo's are $15 each, I ordered 5 more so I could get a better feel for them, hope they'll be able to replace the Glads. I'll report back on them in a month, should be enough time to evaluate them.
Funny how the Glads have gone south now that there is a $4,000.00 machine that can clean with out them, probably a coincidence