Why is there no option for gift wrap diffusor in complete blades?

I've been exploring TCSS over the past few months, and one of the things I've come across is the facets of blade making. I could make my own blade, but I keep swinging between "I have enough frustrating projects going right now" and "nah, it'll be fine". Regardless, I'm curious. There are complete blades sold, and there's the option for Corbin film and TCSS nylon tubing, but no option for the gift wrap/cellophane/polypropylene film and combination with Corbin film for Erv style diffusion. I figure if there's someone at the shop rolling up Corbin film into blades, why not gift wrap?

Mainly because the cellophane is pretty hard to keep clean and we just never decided to offer it.