Hey there, there is nothing like ours that exists? Please read further into our project as i believe you are mistaking us for a crypto exchange which we're not.
Having masternode as the main feature of the coin is so outdated we almost have 400 - 500 masternode coins already. nonetheless there are new masternode coins that actually have a needed product in this space.
I don't think an exchange specifically for masternodes is necessary, plenty of exchanges around and they are working just fine.