We sell baby gates on our site and on amazon. We have combination of gates & extensions of different sizes as group products. It is essential that we keep them as grouped products from inventory management point of view. As each gate (of different size) & each extension (of different size) has different SKU which needs to go from our inventory when a combination of gate + extension is sold.
On Amazon we want to show multiple of these (grouped products) options as one configurable product eg.http://www.amazon.co.uk/Safetots-Extra-Safety-6-4cm-Extension/dp/B00IJVY5FI/ref=sr_1_29?ie=UTF8&qid=1446194604&sr=8-29&keywords=safetots+gate It is a configurable products with grouped products as options.
As magento won't let us do it. Please can some one guide on what might be better way of doing it.