altering parts on an insurance job is possible, but it depends on who is doing the work, you'll need to speak to them and expalin what you'd like to do, hopefully they should tell you what the parts cost for the original, and you pay the difference, some might ask you to get them and they refund you what the insurer would have paid out. and some will refuse, and only do what the insurers asked.
as for parts, yes there are indicator Zed badges, you'd need to flush the original zed badge indents. if your at it you might as well replace the wings with the FRP ones with the vents built ito them as well, check ebay think there is a set on there, about £140.
the "indicators" in the bumper are actually reflectors, i think envy do the clear ones for about £80, i might be over priced on that but you'll need to check.
front bumper, is down to personal choice, i'm about to fit the nismo N1 style bumper, but you have a whole choice out there.