If you want an idea of how the WRC was like in the older days, WRC's youtube channel has a bunch of the the older rally reviews. For example, here is Day 1 of the 2001 Monte Carlo Rally:

https://www.youtube.com/watch?v=gDWFAJbHdD4

The channel also has a full 50+ minute review of entire rallies, but I prefer the 26 minute day-by-day versions. Fans seem to agree that 2001 was perhaps the best year in the WRC - many former and future WRC champs, and probably the last year that specialists were able to win their specialized rallies.

Overall, the channel appears to have rally reviews from 2001-2008. Unfortunately, I don't think you can download the reviews even via external download websites because WRC didn't make the download links public (though I'm sure there are other means you can use to download - I'm not tech savvy enough to figure them out).

There are other non-official youtube channels that have older WRC reviews from before 2001.