I believe I can produce elliptical shaped trumpet bells, however I need elliptical shaped tuning slides. Looking for a source. Harrellson is probably out as he's kinda priced his stuff out of the market for folks who make trumpets like I do. M&K...well I don't think they make ellip. slides and besides, I find them next to impossible to meet up with by phone or otherwise. Any sources? Oh Yeah, also Kanstul won't make them for me--probably figures the demand is not sufficient to make a profit or just doesn't want to develop new tooling. Getzen---I've never found Getzen to be cooperative in any way with independent trumpet makers and unwilling to sell any components. So who else????? Thanks!!