https://www.amazon.com/UPOWEX-Resistance-Whatafit-Exercise-Training/dp/B07DWSPQQY/ref=mp_s_a_1_2_sspa?keywords=resistent+workout+bands&qid=1574278477&sprefix=resistn&sr=8-2-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUFBRjEzQ0NVWTJONDMmZW5jcnlwdGVkSWQ9QTAzMjUyMDRYWFAzOFFKNkVVVFomZW5jcnlwdGVkQWRJZD1BMDc4MzkwMDFPTUJWOFk4VTZCUEEmd2lkZ2V0TmFtZT1zcF9waG9uZV9zZWFyY2hfYXRmJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==

Something like that could work a treat, double up the band's for more resistance where needed. You're pretty advanced for me to be saying "hey do this" but a collection like that has served me well for three years of heavy use.

Good luck!