Problem is if you want that authentic looking sixties tort, nothing else really comes close. Which is why, a couple of years back, when I need a pre CBS tort guard for a 63 P, I spent out the dosh on the genuine article. It took some finding, plenty of searches and e-mailing but was worth the effort and the wait.
It didn't come cheap and mrs mac thought I had lost the plot, "Spending all that money on a bit of plastic from the sixties, that looks like it needs a damn good clean". Ultimately though, the bass was complete once again