Decals available for 1/20 Lancia Stratos?

I recently acquired an old 1/20 Entex Lancia Stratos (76/77 Monte Carlo). Knowing nothing about Entex kits, are the decals worth using? They are a bit yellowed, but nothing a soak in some sunlight won't fix.

As an option does anyone know of an aftermarket set of decals available? My searches have come up empty.