HI
I have a Q S1 with all the lenses. I have done quite a bit of buying from Japan for various Pentax needs. That includes some of my Q lens. I have only had excellent results. They have been honest, well priced, and the items always matched the description and been a pleasure to use. So I would diffidently pursue a well price Q lens as a replacement. If you use Ebay they do offer excellent support if a purchase goes sideways.