Maybe there is a misunderstanding
you do/must not have to use the lnd for driving a digital reverb. It is not like a reverb spring. The digital reverb unit is made for working in low voltage area and does not need a driver like a tube or a hi voltage FET together with an OT. But you can use this unit like an effects unit.
It has to be matched adeqautely regarding the level and impedance and a coupling capacitor for DC blocking, that is all. For that have a look at effect insert schematics. You can handle it like an external effects unit.
Regards
Herbie