Natty's 'Red' is a great wax and I've just finished a tub of it myself (the wider jar one) - not all stockists have this as it's also sold in the regular tubs that the white and blue versions come in.

tbh. if you can't find it and liked the red, then the switching to the blue version won't make any discernable difference, apart from it smells of bubblegum instead of strawberries (the white one smells of ice cream and would also work just as well). Don't get too influenced by the colouring of waxes, especially if it's going on a metallic car, as it makes no difference.

On single stage paints, then products like Zymol's 'Ebony' or 'Rouge' on black and red respectively, or Tropi Care's new 'Crystal Black' can have an effect, but all the Natty's waxes will work equally well on all colours.

btw. as has been mentioned, the 'Red' is a limited edition of 1000 jars, but Poorboys have released that same 1000 jars before and then the following year released a 2nd batch of 1000, so it's not necessarily the end of the line if everyone's out of stock of the 'Red'. Again, it's not worth waiting though, just get the Blue if you can't find any