So unfortunately I posted that without realizing they were a lbs only and wouldn't ship to me. Any idea where I can find the exact match? I've had no luck finding it.

I ended up buying this : Altus Shimano Cassette Sprocket CS-HG31 https://www.amazon.com/dp/B005DTX1VS/ref=cm_sw_r_cp_api_glt_fabc_MCJQVQ1KDWT0PETY4YSY

Do you think that would fit in place of mine?

I ended up buying this : Altus Shimano Cassette Sprocket CS-HG31 https://www.amazon.com/dp/B005DTX1VS/ref=cm_sw_r_cp_api_glt_fabc_MCJQVQ1KDWT0PETY4YSY

That should fit as it is 8 speed. Just make sure you bought the 11-34 version of it or else you would have to do some indexing.

I assume you're American, I looked around Amazon and other common shops like REI but couldn't find the exact one. On Amazon they have a 11-30 HG50 8 speed but you would have to ensure your derailleur can support that and if it can, you need to do some indexing. 11-30 would be solid for flatter courses.