Re: Tama hold-tight washers?
You could try Hold-Tight tension rods, they have a nylon insert that is supposed to help prevent detuning. Last I checked, though, they were pretty expensive, definitely moreso than that eBay listing for the washers. You could also check out GPI's "Lockerz" product. I have never had problems with detuning with my snare (which has non-insert threads and nylon washers) or, unhelpfully, with my Superstars (which have insert threads and only metal washers[though I might actually with the bass drum]). HD Drums also make some sort of cool sleeved nylon washers in a wide variety of colors, but they probably aren't your solution if you already dislike black & white ones.