Macau tourist visa while having a business entry permit to Hong Kong

Hello ,

I am Harsh, I already got the Business entry permit to Hong Kong and planning to travel on 5th of June.
I want to travel to Macau also for two days in the same trip with my friends . But I could not apply a macau entry permit. The reason is I thought the same entry permit is valid for Macau too .
Although I am going to Hong Kong on business purpose , I am going to macau for just for sight seeing with my business partners. I have my Macau friends to sponsor me from Macau also .

Is it I can apply a tourist entry permit again in Sri Lanka while having the business entry permit to Hong Hong?
or I can get a Macau entry permit in Hong Kong Because I am flying on 05th of June .

And I only got a single entry permit to Hong Kong , if going to Macau and come to Hong Kong again is it need to get a double entry permit again?

Please advice me .
Thank you .