Bathroom equipment

[Edtheread]

In 2009, we had an Ideal Standards bath installed (Part number E7351) with an IS waste unit (Part number IWS70). Today, we have a small leak coming from part of the waste unit. However, not all parts of the waste unit are available, as they were discontinued in 2012. The problem is there is no conversion kit for a normal waste unit, which means either throwing away an excellent bath, or trying to get someone to drill an overflow hole in the bath and try to get a drain kit to fit the hole after removing the current mechanism. Any suggestions would be appreciated.