It's on Amazon right now for regular price (or at least, not outrageous scalper prices). I bought it from here, and my copy sounds perfect.
https://www.amazon.com/gp/product/B07NR8KRG5/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1
Yeah do this. The ones below have been great for me.
Etymotic Research ER20XS High-Fidelity Earplugs (Concerts, Musicians, Airplanes, Motorcycles, Sensitivity and Universal Hearing Protection) - Standard Fit, Clear Stem, Clear/Frost https://www.amazon.com/dp/B00RM6Q9XW/ref=cm_sw_r_cp_api_glt_i_6CZPC86YQ8VZ84HCTQ2C?_encoding=UTF8&psc=1
There’s this Amazon page that occasionally restocks so maybe just try to keep an eye out for a possible restock?? Here’s a link From the Fires Record
I'd check Craigslist.org
The following website has consumer reviews of ticket resellers. I'm always suspicious about these sites b/c you never know if they recommend companies b/c they get an affiliate commission or not. But this one looks reasonably accurate based on my experience:
https://www.consumeraffairs.com/entertainment/ticket-websites/#best-rated