Yes you can but the company is here in the States and I’m not sure if they can ship you parts. I also believe that RIA has sights that they sell but I’m not sure if they can sell you the parts.

Rock Island Armory®, Gun Sights

dawsonprecision.com

 

I think I would just replace the slide. By the time you have Novak cut and install a front sight, you'll be coming close the the price of a new slide. Get a slide and transfer the parts over.

https://advancedtactical.com/tac-standard-fs-45acp-slide/

 

Oh fortunately, labor is cheap here and I can get everything done for under 60 dollars including parts

 

I wouldn't spend any more money on that gun. I would put the money into another gun with the type sights and everything else you want.

 

You can remove the staked in front sight with a grinder/dremel. You should be able to find, or make, the front sight of your choosing. You would re stake or peen it in. Very secure way to mount a front sight.

You should be able to find a rear sight of your choice to fit the existing rear dove tail.

Probably pretty easy to get what you want for very little money and a bit of effort.

An enormous (tall, long) front sight is best done (probably) with a dovetail.

 

If you are paying to have the front sight cut and replaced, just go ahead and get the rear sight done. The options for GI dovetail rears are not great.

This gun started as a RIA GI, but now it’s a backup bullseye gun. The only remaining original parts are the slide, frame, and barrel.

 

Nice set-up
Do you mind listing the brands of the replacement parts?