No further order planned. I said so and asked for each missing line's availability, including the extra cable.

Keep the installed cable out of the shortage list except as a separate clarification. Missing reserve cover and missing operating hardware mean different things to the workshop

Have they offered anything definite in response? A possible local alternative can be explored, but it should not be described as an offer from the seller or a change to the original order balance.

They offer the cable alone now, other kit items later. No date for those other items.

Does accepting the cable leave the remaining kit explicitly outstanding, and are there any added charges in that proposal? Both need an answer before you authorise it

Hazel's right. A partial delivery could still be useful, provided purchasing records what it settles and what it doesn't. I wouldn't reject the cable simply because it doesn't solve the whole kit, but I wouldn't close the whole kit for it either.

No added charge stated; I asked for confirmation of that and the remaining balance before agreeing. Nothing dispatched.

Has the cable identity been tied to the delivered configuration? The word pendant cable alone may not establish the particular spare you ordered

Maintenance confirmed the specified reference. Seller has not yet confirmed the proposed supply uses that reference.

Then the identity of the required spare is established, but the proposed supplied item is not. Keep those separate while purchasing seeks the written terms; no stock or settlement change has happened yet.

Purchasing has all three open points: supplied reference, no added charge, and remaining kit balance. Stores unchanged.

That is a concrete reply to their partial proposal. Please return when those terms are answered, rather than let another next shipment message count as agreement