I've been looking at a few of the main restoration parts store websites, comparing prices, and have noticed that some of the parts have fairly different prices (cab mount kit say $27 vs $15 or pedal pads for $8 vs $3). Does anyone know if these parts all come from the same manufacturer and each store marks them up differently, or is there a difference in quality? I realize those examples are small fries compared to other parts but the differences in price just made me wonder if there was a reason, or if it was a mark-up thing.