I want to say that "A" is not interested in a given thing "B".

I want to start my phrase with "There is no interest". I am forcing this limitation because I have no problems in saying it in the direct order (A is not interested in B).

To clarify possible misunderstandings: The one who shows no interest, who "doesn't care", is "A". The thing that is "put aside", "ignored", is B.

I am looking for something in the lines of:

• (Ordering I) There is no interest (from/by/of) A (in/for) B.
• (Ordering II) There is no interest (in/for) B (from/by/of) A.

1. What is the best / preferable / most common choice of prepositions?

2. What is the preferable / most common / most natural sentence ordering, among the two given above?

3. If the placeholders "A" and "B" are big sentences, is there a better choice to avoid misunderstandings? For example, if A = "the students that failed the test yesterday" and B = "studying math for the next couple of weeks".

Note: I know that this question on ELL.SE explains that the preposition "in" should be used. But (1) this only covers a part of my question and (2) somehow, especially because of this particular sentence order, I have a feeling that "for" also fits, and the linked question doesn't mention "for". For these reasons, I believe this is not a duplicate.

EDIT:

As @stangdon pointed out, and I actually agree, this way to construct the phrase might seem awkward and unnatural. A more natural construction, equivalent for my question, would be:

• I am impressed by the lack of interest (from/by/of) A in B.

• I am impressed by the lack of interest (from/by/of) the students that failed the test yesterday in studying math for the next couple of weeks.

The word "among" was suggested, but it fails if A is not a group of people, but a single person:

• I am impressed by the lack of interest (from/by/of) Hannah in going to the party.