dcaudioIt uses a Sony KHM-230AAA laser still available still cheap, if your mechanically minded should be about 1hrs work to put in. Buying the whole mech/laser is far easier to put in than just the laser.
Like many of these units, the SACD laser is not working as well.
https://www.ebay.com.au/sch/i.html?_from=R40&_nkw=Sony+KHM-230AAA&_sacat=0&rt=nc&LH_...
As far as a dac goes, to me only R2R dacs for Redbook, and for reasonable priced one Soekris has good ones and know what he's doing with R2R. The pic for me is the 1541.
http://www.soekris.dk/
Cheers George