Lee Valley recently bought Leigh, so they will have all of the parts, and pieces. I have noted via email, that at least twice a year they have been having sets of the Leigh bits on sale, at pretty good mark downs. So if it isn't a pressing need, you might wait a bit, but get signed up for Lee Valley emails. 

They have their "seconds" sales, which are DA bomb, and you can get Lee Valley, Veritas tools for literally pennies on the dollar, and I can hardly ever figure out where the "defect" is. So you get those, plus a lot of sale info, and I never get the feeling I am getting spam bombed, so done tastefully.

Also conveyed via email are when they have discounts on their gift cards. I usually get the $1,000.00 card, and it is $850.00 plus you can use them just like cash, for sales and other deals, free S&H anything, just like cash, so a good way to get a good price cut, and other deals as well. Unless you don't like saving $$$$$$.

Worst case is you sign up, don't like it, hit unsubscribe, and that's the end of it. LV is a quality outfit, and doesn't want to sully their good name making folks mad at them.

Anyhow I have bought sets for my Leigh jig, and they are the real deal, and just a lower price, so I call that a good deal. Seems the best deals are on sets, but they also have lower prices on single bits as well. As far as I know it's email only though. 

Hope this helps someone.