even with all the right tools Ive had to do some special adaptions when I had my shop.
some foreign car springs and shucks had almost zero clearance and needed 3-4" of compression soo what did I do?
I put about 15-20 stainless hose clamps across each 2 sers of coils and tightened each little by little till the whole mess was compressed enough and much safer than zip ties.
then after install zip them off with the ait ratchet......
or cut em with a exhayst zipper.
I even have some stored with hose clamps on them from 20 yrs ago.