Invitation letter to Montenegro. Please help .

Hello good day everyone I am planning to visit Montenegro in the next few months maybe in February or March

My nationality requires a visa to visit Montenegro as well as an invitation letter 

Serbian Embassy in Kuwait is the one who issue visa to Montenegro because Montenegrin Embassy doesn’t exist here , and Serbian Embassy request an invitation letter signed by court or municipality and they need the hardcopy so I can attach it with the other documents then they can issue a visa for me and I mean tourist visa

my question is does anyone have any idea if there is someone physical person or a legal entity  who can provide to meet invitation letter for visa purpose

Thank you