Not needed, that topic is only about using a spacer or not, with what board, and which material is best. Don't think USD 79.00 is that much comparing to the price of a new Metal. Catek is the only one making these spacers. But I think that suspension kit, which I also have, will do the job too.
Or better, don't buy a Metal than you don't have to be worried if your board breaks or not.