There have been easily 10 different designs of cradles people have built over the years. The issue is they are very labor intensive, which makes them hard to cost justify as replacements for the stock one. Most of the ones that were made to sell were priced in the thousands... not hundreds.
Additionally, with the bare 88 cradle being about 50 lbs, your realistic weight savings opportunity is in the 20-30 lbs assuming you can save some weight.
Here are just a few of the different styles:
[This message has been edited by fieroguru (edited 01-12-2019).]