Unfortunately, we do not have hose reels of this type as of today and we do not know when we will have this in our range. It is of course something we hope to develop and manufacture these in the future, but development on such a project is not in progress.
You can buy hose drums from, among others, RM Suttner, IPC etc., and we can offer the following information for help accomodating AVA equipment into these.
The end of the hose that goes in towards the gun has a quick coupling that we call an AVA-male connector. This coupling is used a great deal by most brands (apart from Kärcher) and is therefore not specific to AVA. If you buy, for example, a Bosch coupling, this will fit here.
If you want to switch to threads so that AVA can be connected to a drum, this is easily solved with a female-female coupling that is attached to the end of the hose and an AVA-male to ¼" threads at the other end. When these are connected together, you have threads can build on to any kind of high-pressure equipment. AVA does not have other transitional parts such as to a ⅜" or other variants, but these other parts should be fairly easy to get hold of in your local hardware and plumbing store.
When this couplings mentioned above are connected, they look like this:
AVA female coupling: https://avastore.co.uk/product/ava-female-coupling/
AVA male to ¼" threads: https://avastore.co.uk/product/ava-male-coupling-to-1-4/