Not sure on prices but they are lovely stables and good quality. The ones I know were made to order to fit quite an odd shaped barn with some funny angles - did a lovely job
Our barn stables are Hancox - they are good quality, and were designed to fit our space.
We went full wood panels, swivel mangers and automatic, 9 litre waterers and sliding half doors - which give the option of either allowing the top door to be open or closed.
Been in a year and look as good as new - really pleased. Not the cheapest company but excellent quality.
We also bought rubber mats from them too but they were crap so avoid at all costs!
I had Hanncox stables installed in my barn about 4 years ago, I highly recommend them, they made them and installed them and they are much admired and very solid, no complaints at all, will build to your specs and are very nice to deal with, very helpful.