honestly I don't find any of the 3rd party replicas any good...I ordered one once and it was complete garbage...it's a can of worms and although they state 1:1 scale but none of them truly are true 1:1 scale, the hammer heads are too small and the handles short...
your best rest bet is get onto etsy for 3D printed hammer kits you can put together or have made fully for you, or go with the Hasbro legends Mjolnir the legends replica is true 1:1 scale made from the molds of the movie props, I have one and it looks great...it's got a good weight to it and the electronic effects are great too, the leather looks real enough as well...my only gripe with it is that it's clearly not chromed like the film prop, the head gets away with it by the metal strips on the handle look abit plastic like...
Im considering buying another one to paint and convert to look more metal like, like the version in Ragnarok...
Best thing as well it isn't bank breaking...I picked up mine for £79 by ordering from the US...it's like $99-$139 or something over the pond...
for or me it's easily the best and cheapest on the market...
https://www.amazon.com/Avengers-Mar...996020&sr=8-1&keywords=Marvel+legends+mjolnir