Forcing 0s in Access SQL

Hi.  I have a mini- app written in Access (VBA) in which I loop through about 15 queries and write the results to an Excel template.  The template reads the raw output on a back tab and displays it on visible tabs in a presentable type way through cell references to the data tab.

My issue is this:

In a query similar to this

SELECT
“1” AS Sort,
"HC " AS [Fmt],
Sum(Iif([Trim Code] IN ('A'),(Actl_MR_Bind+Actl_MR_Mfg_Print),0))  AS dPa,
Sum(Iif([Trim Code] IN ('B'),(Actl_MR_Bind+Actl_MR_Mfg_Print),0))  AS dPb,
Sum(Iif([Trim Code] NOT IN ('A','B'),(Actl_MR_Bind+Actl_MR_Mfg_Print),0))  AS dPo
FROM HDB
WHERE …

UNION SELECT
“2” AS Sort,
"TR " AS [Fmt],
Sum(Iif([Trim Code] IN ('A'),(Actl_Run_Bind+Actl_Run_Mfg_Print),0))  AS dPa,
Sum(Iif([Trim Code] IN ('B'),(Actl_Run_Bind+Actl_Run_Mfg_Print) ,0))  AS dPb,
Sum(Iif([Trim Code] NOT IN ('A','B'),(Actl_Run_Bind+Actl_Run_Mfg_Print),0))  AS dPo
FROM HDB
WHERE …

UNION SELECT
“3” AS Sort,
"MM " AS [Fmt],
Sum(Iif([Trim Code] IN ('A'),(Actl_CtnPal_Bind),0))  AS dPa,
Sum(Iif([Trim Code] IN ('B'),(Actl_CtnPal_Bind) ,0))  AS dPb,
Sum(Iif([Trim Code] NOT IN ('A','B'),(Actl_CtnPal_Bind),0))  AS dPo
FROM HDB
WHERE …

When run  it for a vendor who produces HC (1) and MM (3) but no TR (2) the results write out as:
1  HC    100   200  100
3  MM   200   100  100

And if a vendor has no data, the query results do not write out to the spreadsheet at all and writes the next query over its intended destination cells.

So, my question is:  Is there a way to instead output the query results like this:

1  HC    100   200  100
2  TR      0        0       0
3  MM   200   100  100

Or do I need to find a better way to do this all around?

Many thanks.