Oem turbos are 500+core each. No idea on gearhead, you would have to contact matt directly. IIRC, SBS has them on there? My guess would be 800$ each for aftermarket options.
Yeah sucks big time. Honestly, if i could diy, i would replace the seals and do a CHRA upgrade. But probably not an option for most folks, unless you can get over to a member who can such work.
Not dangerous to drive as is, stay out of heavy throttle as much as possible tho. Now a leaky injector, that would require immediate attention.