I bought one through
Toiletology 101: Flush out the facts of repairing toilets; save water and money. for about 90.00 some time ago. I saw them at
alegromedical.com for 75.00
Before you buy, if your parents are over 65 years (& US residents)- check with Medicare and their health care provider. This item, along with installation, may be a covered purchase. They may even pay for installation.
The Area Agency on Aging (
n4a | National Association of Area Agencies on Aging) may be able to help you through the Medicare qualification paperwork. Medical Supply stores also can help with the governmental paperwork.
It is very easy to put in. It is like putting a toilet on top of another toilet. I used an extended wax ring on the thick tiled floor with a low toilet flange, but you may not need it. It seems to be safer than an elevated seat or seat blocks. It is rock solid and can be painted. (In case your parents' bathroom is purple and orange.)
Paul