My L-Nav Kaput

Have been content with my GPS-Nav Model 20 & L-Nav System (was upgrade
from an early EW) until my L-Nav began to act up. It is now totally
kaput.
Have tried all the tricks I could find on r.a.s.
While waiting for CAI repair service to reappear in the USA, have been
getting some input from my Club members.
Happy with my DG-300, so panel and instrument space limited. My DG-300
panel arrangement:
C C-compass
1 2 3 / #20 1 Kaput L-NAV spot 2 ASI 3Alt Note: 1-2-3 are 80
mm CAI 20 on forward end
4 5 4 CAI Vario 5 Winter mech. vario
Note: 57 mm
6 7 6 GPS-NAV display 7 Becker Transponder (one too
many close calls flying at
8 8-Becker Radio (OAT also
present) ASI/Minden)
I do have a Compaq IPAQ 3995 to use also with GNII or See You Mobile.
What options would others recommend?
1. Fix L-Nav and keep the GPS-Nav #20?
2. Keep GPS-Nav and get something else?
3. Replace both?
Want a secure system.
Please reply only on rec.aviation.soaring.