Ive 'intended' to drill/tap my .22Mag Ultra Varmint for a front ramp (1 screw is all) for some years now and use the WGRS peep. Now Im so used to it with a tidy scope mounted that Im not going to bother. I still shoot open sights on my rifles with them, but dont do as well as I used to. ie, if you cant see it, you cant hit it.
If you must have open sights, then you are just 'going to have to bite the bullet' and pay to do it.
Figure its that cost vs the cost of a scope, 6 'o one, half doz. 'o the other.