Identical to the originals even.
I contacted the company in Toronto that has the original molds and told them a bunch of us are interested so they made some more. You have to buy from their distributors though.
I ordered from https://performanceimprovements.com
the Canadian distributor and they cost 169.99$ CAD plus tax.
The American distributors are listed on the manufacturers website here: http://www.willpak.com/distributors/
They are special order and the supplier will probably want a deposit.
Willpak part number is 10000