Hey guys, this is ripe (John) the designer of the SE BassLine x0x.
I understand the price is steep, but really if you start to look at what it costs to get a small quantity of enclosures and knobs, I think you will see that it's not that cheap to do.
For example, the bare case itself is over $200 (frontpanel express), then you have the silk screening in two colors, which is around $200 (minimum), the knobs are ~ $60 per set (digi-key), then there are the different switches, trial and error parts for prototypes, etc and all the time to manage the project. This is on top of the standard x0x kit prices.
Prices go down as quantity goes up of course, but you can't hardly find a supplier that will talk to you for such small quantities.
I would be willing to sell cases alone, but there are some modifications needed for a standard x0x to fit, and I think most people would be shocked at the price I would have to charge for just a case. Msg me privately if you really are interested in just a case...
There is always the standard x0x kit or the ones on eBay for those who don't think it's worth the extra for a special case.