stripped screw and I dont have power tools. (dell precision 5560)

so lately i have noticed that the screws get loose and literally fall off my laptop. figured i could just screw it back in but i only had flathead screwdrivers. i had to work with that. specifically only two screws kept falling and at this point its 5 to 6 times. so i figured ill just buy some new screws and remove all the old screws and put in the new one. but i could only manage to get 6 out and two were very stripped and screwed in very tightly (completely unrelated 2 screws compared to the one i talked before.) now the old screws were starheads and i bought new screwdrivers to take them out but i cant seem to remove these two. i tried the rubber band method and many more. at this point only three options are creating a mold and making a screwdriver for those screws, using wd-40 to loosen them and using powertools to make it flathead. but i dont wanna destroy the gorgeous aluminium back plate and i also dont have power tools. is there any other way to remove it? if so please do tell me. and also the spaces for them are very tight. i dont have a phone so i dont know how to show you guys but you can search it up online (ik im askin too much).

thanks,