I'm Europe so I can't help you with a link in the USA.
On the manufacturer's webpage, I found the following distributor for it;
United States:
Glass Box Tropicals
email: info@glassboxtropicals.com
The Synthyc strings, I cut into peaces of 1/2 inch.
The akadama, I mix in with the dry media. I tested it first on my Cymbidiella rhodocilla. A young plant that wouldn't grow and it was going the way my previous 2 went, down to orchid heaven. So I thought what the heck, A few weeks later it started putting out new roots and grew new leaves and most impotently, it's still with me and growing. I'm not saying it's needed but it certainly gave me good results. I got the idea from an orchid grower that grows in leca and she got beter results with some finer rooted orchids that weren't doing well growing her way. So my mind started grinding and digging into my memories from Vietnam, where I saw with my own eyes how Paphs and other rock and ground dwelling orchids grew. There always was a mineral based component in the media or their neighborhood.
It's important to get the high grade, hard baked Akadama.
The cheaper, standard used form can be used but it pulverizes much easier. The clay substance used is the same in all Akadama. It's just the baking/hardening process that's different. Whatever Akadama you can find, try to get the largest size pellets.
Note, when you don't need to repot your Paphs, you can easily top dress a bit on the surface of the pot but not against the plant base as it can hold too much water for a longer period and can cause problems.
Good luck !
