Kick panels

Well you could do it with fiberglass. Looks like it might be quite a project. By the time you buy all the supplies and do it especially if you start messing up it might cost you as much as just buying the Q forms they sell for your particular vehicle. They sell them at crutchfield and maybe some other places too. I think they are around $229

if there is a factory plastic piecs you can mold the ring into the plastic piece. this will let it the kickpanel attach with that same clips and butt up against the other factory pieces the same way as they did.

Can you elaborate a little please?

Why dont you just check with a wrecking yard to see how much an extra set of panels would cost.  It may be cheaper to work with those if you wish to preserve the originals.

what you would need to do is to take your mounting surface, we'll say the classic tear drop shape. you will need to position that onto the factory kick panel piece. use some stilts or wood wedges to angle it how ya need it. then you can take them out and wrap them in a mold fabric. you need to keep the material kinda thin. i would use grill cloth or a thicker. there is a material that works well that i found at JoAnn fabrics called ponte double knit. it is twice as thick as grill cloth. once wrapped, resin it. then you can take some duraglass/marglass and resin mixed and pour it inside and rool it around. this will give it strength. then you can smooth and sand as needed then cover it as you please. peace, Trevor