Thanks for all of your excellent responses and information!
1) I may have been having some trouble with the model number... I was searching for 74HCT4046A. I rather imagine that I got this particular number from some reference project. The extra "T" was limiting things. Here's the difference with the T model: The only difference between the 74HC4046A and 74HCT4046A is the input level specification of the INH input.
2) I am now able to find available stocks for the Non-T model at Mouser, where I usually shop. However, the data sheet link is tied back to TI, directly, and it fails. It fails via Digikey and TI.com, as well. I can get the Nexperia data sheet. Has the TI model changed to "CD74HC4046?" That did not seem to work, either.
3) Yes, I do refer to other projects for learning and inspiration. I might even build one, fully as designed. However, I do prefer to dig down into the circuit, in order to learn. Learning and building are the fun part, to me, as opposed to buying a unit, which I probably could do for cheaper. But, what's the fun in that?
Cheers!