Big box stores should have them in variety packs, but not sold separately. Amazon has them all day. https://www.amazon.com/Baomain-Insulated-Connector-Electrical-Terminal/dp/B01MRRMVZL/ref=mp_s_a_1_7?keywords=.110+connector&qid=1580649060&sr=8-7
Those are standard spade connectors.
$5 for 100 on Amazon, but I've been able to find them basically everywhere (Home Depot, Lowes, Best Buy, Walmart, any audio shop).
You can get a 14-16AWG into it, way more than enough for 200wrms.
https://www.amazon.com/gp/product/B01MRRMVZL/ref=ppx_od_dt_b_asin_title_s00?ie=UTF8&psc=1 Will this work as well?