LF: Thunderstone(s) ; FT: BP items/Megastones

[Item]

Megas I have available: Absolite, Alakazite, Blazikenite, Kangaskhanite, Lucarionite,

I have 458 BP's.

I'm looking to get around 5 or so thunderstones, but if you only have 1 I'm fine with that as well.

Looking to do 1:1 for a megastone, or 2:1 for BP items (2 battle items for 1 thunderstone)