If my memory serves me right, I purchased my die set directly from A-Square. It came in a grey box with A-Square's logo on the top. They appear to be made by Hornady. Don't remember what I paid for them. I don't see dies listed on A-Square's website though. You may want to call them to find out.
Midway has a set made by RCBS but it is a special order with a 90+ days wait time for $142.99.
Kevin