comments:
jaydubbs15 posted on r/plumbing5d
This might work: https://www.amazon.com/Quickflash-Plumbing-Flashing-Panel-P-100/dp/B00XO2UHBS/ref=pd_bxgy_thbs_d_sccl_1/137-6795535-7078817?pd_rd_w=vf4L3&content-id=amzn1.sym.9bef5913-5870-4504-8883-3ba89d7f8e39&pf_rd_p=9bef5913-5870-4504-8883-3ba89d7f8e39&pf_rd_r=66TBSM22HBJCXPHVMV5A&pd_rd_wg=K5GGn&pd_rd_r=c501d4aa-abef-4769-a78b-3bef0de40bc7&pd_rd_i=B00XO2UHBS&psc=1