Please be so kind as to correct the following sentence to natural English.


Hi, (Asian client) san,

Thank you for your contact.
We're sorry that we did not send a reply to email
due to lack of inventory.

As for the following goods, the stock is still insufficient.
Shipment will be scheduled for July, how is it?
If you would like to deliver separately, please let us know the required number.

(Goods 1)
(Goods 2)


For the following goods, we are ready to ship,
so we'll ship at 15th Jun.
We'll attach an invoice and packing list, so please check.

(Goods 3)
(Goods 4)
(Goods 5)

Best,
Shokew

Hi, (name)-san,

Thank you for contacting us.

We apologize for not replying to your email due to a lack of supply.

The following goods still have insufficient stocks as well. Therefore, the shipment for these goods will be scheduled for July. Will that be okay?

If you would like them delivered separately, please let us know the required amounts.

(Goods)

The following goods are ready to be shipped. They will be shipped on June 15. We will attach an invoice and packing list, so please check.

(Goods)

Best wishes,
Shokew

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You can also use "Regards" to sound more formal instead of "Best wishes" :)