Where can I purchase the right tool for removing spark plug boot

Hello, i have another question for you all about my van. I brought the pictured long reach spark plug boot puller tool to pull the boots off of the spark plugs. The tool will not reach all the way down to the bottom of the boot. Can you tell me where i can buy the right tool for the job (both make and model number) of the tool? I have also enclosed a picture of the number one (1) spark plug wire. Just guessing, i would say that the boots are about 6” to 7” long and the space around the boots are very tight. The tool i brought was a Schley (sch65350).0).