I'm having trouble finding a medium selection of 10/13mm (flexible) tubing (I'm looking for white). All the usual suppliers (ekwb web store, ncix) seem to carry a limited selection compared with a few years ago. So, I'm wondering if 10/13mm tubing is on the way out. I'm upgrading my current loop, which has 10/13mm compression fittings. I need to buy more fittings, and I'm wondering if I should stick with 10/13mm or go to something else. (I need a total of 10 compression fittings and currently have 4 x 10/13mm, so it's 6 new vs. 10 new). All thoughts welcome please!