[l-Date]
To:
[r-Name]
[r-Address]
From:
[s-Name]
[s-Company]
[s-Address]
[s-Phone]
RE: [s-Reference]
Dear [r-FName]:
The above-reference contract
entered into on [s-ContDate] specifies that we will deliver [s-GoodsSpec].
We regret to inform you that the
goods herein referred to are unavailable due to [s-DescriptionReason]. We hereby request your authorization to
substitute the following product in lieu of the one we cannot obtain:
[s-ObtainableDescription].
If you are in agreement to this
substitute, please acknowledge your acceptance by contacting our office.
We will look forward to your
response.
Best regards,
[s-Company]
[s-Name]
[s-Title]