Just came across this on the Argos stock checker while looking for something else. The stock checker is showing lots of stock. On Argos website it says not available online order instore as always with rings due to sizes.
If already going to store worth checking.
My local stores with stock/order in are small heath Birmingham size H, and chelmsley wood Birmingham can order in an L.
To find out if your local has stock or where does and what size check stock on any item press the store when the menu comes up next to it showing map between the address and opening hours is the direct number for that store. Choose option 4 to go straight through to the store can take a while to answer but hope that helps.