Glad you find the spreadsheet useful. In production is a best guess based on observed availability of the blades (on ebay and through forum posts here).
There are quite a few Personna blades on the market now and in the past and some have recently been repackaged, so the Personna Reds no longer have red packaging and the lab blues/med preps have had a slight outer box redesign recently and the wrappers changed from blue Personna branded to plain white. Recently there were posts on here about whether they were the same blades following the cosmetic changes.
Still some arguments about what differentiates a med prep from a lab blue, and these aren't necessarily the 'manufacturer' names for the products, either, which all conspires to confuse and befuddle. It's not an exact science, and the spreadsheet certainly isn't scientific at all, but I've put what I have tried to offer my own opinions on a best endeavours basis.
P.S. I have used the Timors only a few times and a few years apart; more recent use in a few different razors have led me to the conclusion that they are, IMHO, shite. The spread sheet will be updated accordingly!
With regard to cost - it can be fun experimenting but you might not find any better blades if you like the Rapira Swedish super steel and carry on with the excellent Polsilver and Personna lab blues, if you want only blades still in production. Hope that helps!