I don't think that a breeder needs to have a website to be reputable. I know several very successful and ethical breeders who do not have websites (or their websites are not very good.) They sell their kittens through people they meet while showing, or they rely on referrals from partner catteries. Not everybody is HTML literate
I've been making webpages for the last 10 years now, and while my design skills are still rather limited, I am able to do a lot more than most breeders out there.
Don't base your decision on websites alone. They might not even breed enough kittens to need a website.