Pure Barre double tube options?

[starbelly]

I have been using (and enjoying!) the Pure Barre Resistance Series and until now have used two loop bands that I have looped together (slip knot style). I would like an actual PB tube set, but they are not available near me. I will be visiting an area with a studio and wondered if it is possible to buy one there. If not, can anyone recommend a good alternative? There is one on sale on Amazon for the outrageous sum of $59.95, but the Pure Barre webshop has it for $15 which is what it seems worth. I have an exercuff, but it is not really suited to many of the exercises in the series.

Thank you!